Complex and process for preparing complex

Abstract

[In the structural formula (2), M1 to M4 are identical to or different from each other and represent a metal atom, R1 to R6 are identical to or different from each other and represent a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 2 to 18 carbon atoms or an alkynyl group having 2 to 18 carbon atoms, and at least two of R1 to R6 are the alkenyl group having 2 to 18 carbon atoms or the alkynyl group having 2 to 18 carbon atoms.].

The invention claimed is: 
     
       1. A complex of formula (1):
   [M 4 O(RCOO) 6 ] n   (1)
 
 wherein in the formula (1), M is zinc, R is —CH═CH 2 , and n is an integer of 1 to 8. 
 
     
     
       2. A complex of structural formula (2): 
       
         
           
           
               
               
           
         
         wherein in the structural formula (2), M 1  to M 4  are zinc, and R 1  to R 6  are —CH═CH 2 . 
       
     
     
       3. A process for preparing a complex, comprising a step of conducting a reaction between a compound of formula (3) and a metal oxide of formula (4) in a solvent:
   [M 5 (RCOO) x ].yH 2 O  (3)
 
   M 6   a O b   (4)
 
 wherein in the formula (3), M 5  is zinc, R is —CH═CH 2 , x is two, y is zero; and in the formula (4), M 6  is zinc, a is one, and b is one, wherein the prepared complex is a complex of formula (1). 
 
     
     
       4. The process for preparing a complex according to  claim 3 , wherein dichloromethane is used as the solvent. 
     
     
       5. The process for preparing a complex according to  claim 3 , wherein a molar ratio ((3)/(4)) of the compound of the formula (3) to the metal oxide of the formula (4) ranges from 3/2 to 5/1. 
     
     
       6. The process for preparing a complex according to  claim 3 , wherein the reaction is conducted at a temperature in a range from −20° C. to 100° C. 
     
     
       7. The process for preparing a complex according to  claim 3 , wherein a complex of structural formula (2) is prepared: 
       
         
           
           
               
               
           
         
         wherein in the structural formula (2), M 1  to M 4  are zinc and R 1  to R 6  are —CH═CH 2 . 
       
     
     
       8. The process for preparing a complex according to  claim 3 , comprising: a step of dissolving or dispersing the compound of the formula (3) and the metal oxide of the formula (4) in a first solvent and stirring the resultant reaction liquid; a step of removing an insoluble substance from the reaction liquid; and a step of removing the solvent from the reaction liquid. 
     
     
       9. The process for preparing a complex according to  claim 3 , further comprising a step of purifying the obtained complex. 
     
     
       10. The process for preparing a complex according to  claim 9 , wherein the step of purifying the obtained complex is a step of removing the compound of the formula (3) from the reaction liquid; or a step of performing reprecipitation of a mixture of the complex and the compound of the formula (3) obtained in the preparing process.